CN204904222U

CN204904222U - Location indicator

Info

Publication number: CN204904222U
Application number: CN201520523251.8U
Authority: CN
Inventors: 尾形卫; 长濑修
Original assignee: Wacom Co Ltd
Current assignee: Wacom Co Ltd
Priority date: 2014-09-02
Filing date: 2015-07-17
Publication date: 2015-12-23
Anticipated expiration: 2025-07-17
Also published as: CN106201023A; JP6370171B2; US20170262086A1; US9665188B2; CN106201023B; EP2993558B1; JP2016053750A; US9898105B2; EP2993558A1; US20160062490A1

Abstract

The utility model relates to a location indicator, the location indicator of the structure of typeization carefully possesses: the 1st electrode for the receipt comes from positional detection sensor's alternating current signal, and the 2nd electrode, send alternating current signal to positional detection sensor. Location indicator possesses: center electrode (5) to a distolateral opening of following framework (1) of the tube -shape of formation form of a stroke or a combination of strokes form comprises one the conductive part who constitutes in the 1st electrode or the 2nd electrode to the outstanding mode setting in outside, peripheral electrode (2) to surround center electrode (5) mode setting around, constitute by another the conductive part who constitutes in the 1st electrode or the 2nd electrode, and shielding parts (6) of tube -shape, take in center electrode's (5) the part of being surrounded by peripheral electrode (2) at least in well kenozooecium. Shielding parts (6) are at outside and on wall formation insulating layer and constituting of the internal face of the tube -shape conductor that corresponds of part that is surrounded by peripheral electrode (2) at least with center electrode (5) to tube -shape conductor (61) are connected with the earthing terminal of circuit part.

Description

Position indicator

Technical field

The utility model relates to a kind of position indicator jointly used with position-detection sensor.

Background technology

Following position indicator is provided: by possessing the input channel of signal and exporting the structure of that channel has an independent existence, so-called full-duplex communication as the position indicator jointly used with the position-detection sensor carrying out position detection, guarantee with the compatibility of position-detection sensor is higher and versatility is higher, the predetermined Waveform Correlation (patent documentation 1 (with reference to patent 4683505)) between input signal and output signal can also be guaranteed.

Figure 10 is the structure of the signal of position indicator 301 for this patent documentation 1 of explained in general and the figure of its process action, and it illustrates that position indicator 301 is positioned at the state on the plate face of electrostatic capacitive position-detection sensor 302.

Position indicator 301 has peristome in the end side of axis direction and is formed as being accommodated with signal processing circuit 304 in the hollow bulb of the framework 303 of the tubular of pen shape and signal processing circuit being provided to the battery 305 of supply voltage.The part that framework 303 is configured to hold at least operator of the appearance side face of the cylindrical body be such as made up of the Ins. ulative material of synthetic resin etc. this position indicator is covered by the electric conductor be made up of such as metal.

And, the open side of the framework 303 of this position indicator 301 is as shown in the partial enlarged drawing of Figure 11, can be considered as closing on the tapered portion 303a that front end slowly attenuates, be provided with at the outer circumferential side of its tapered portion 303a and form ring-type and the peripheral electrode 306 be made up of the metal with electric conductivity.In addition, the leading section 307a of central electrode 307, as shown in figure 11 with such state of giving prominence to from described outward opening portion, is accommodated in the hollow bulb of framework 303 of position indicator 301.In addition, in order to not damage position detecting sensor 302 indicative input face and increase the contact area with indicative input face, utilize the resilient protection parts 307b be made up of the elastic caoutchouc etc. of electric conductivity to cover the front end of central electrode 307.

In this case, on the direction orthogonal with the axis direction of position indicator 301, the tapered portion 303a of framework 303 between peripheral electrode 306 and central electrode 307, peripheral electrode 306 and central electrode 307 are insulated by the tapered portion 303a of this framework 303.And on the direction orthogonal with the axis direction of position indicator 301, between peripheral electrode 306 and central electrode 307, be provided with the shield member 308 for effectively preventing mutual electrical interference.Shield member 308 is made up of the tubular conductor of the conducting metal forming insulation course 308a at internal face, this tubular conductor be by and form, by central electrode 307 being accommodated in this tubular conductor, thus formed in the mode of surrounding with shield member 308 pairs of central electrodes 307 and shield member is connected with earth terminal (ground connection: following identical), carry out electrostatic screening.

When this position indicator 301 is positioned on position-detection sensor 302, as shown in Figure 10, peripheral electrode 306 and position-detection sensor 302 combine via electrostatic capacitance C1, and central electrode 307 is also combined with position-detection sensor 302 via electrostatic capacitance C2.

On the other hand, due to the AC signal that flows in position-detection sensor 302, therefore this AC signal is supplied to treatment circuit 304 as current signal to signal via electrostatic capacitance C1 and peripheral electrode 306.This signal processing circuit 304 such as carries out the process AC signal amplification etc. of input being strengthened to signal, the AC signal of the output signal as its signal processing results is provided to central electrode 307.When position indicator 301 is positioned on position-detection sensor 302, because central electrode 307 is combined with position-detection sensor 302 via electrostatic capacitance C2, therefore AC signal is fed back to position-detection sensor 302 from position indicator 301.

As mentioned above, the AC signal of enhancing is fed back to position-detection sensor 302 from position indicator 301, and therefore position-detection sensor 302 can detect with higher sensitivity the position indicated by position indicator 301.

In this situation, be set to V at the voltage of the transmission conductor of the AC signal by position-detection sensor 302, the voltage of the central electrode 307 of position indicator 301 be set to e, when the electrostatic capacitance between peripheral electrode 306 and central electrode 307 being set to C3 (with reference to Figure 10), there is following relation:

e≤C1/C3·V

Therefore, the electrostatic capacitance C3 between peripheral electrode 306 and central electrode 307 is as far as possible little, is favourable to the voltage e of raising central electrode 307.

In position indicator 301, make shield member 308 between peripheral electrode 306 and central electrode 307, by the combination between peripheral electrode 306 and central electrode 307 is diminished as far as possible, thus electrostatic capacitance C3 is between the two diminished, thus, voltage e can be increased, and effectively can improve sensitivity.

In addition, as described in Patent Document 1, position indicator 301 can be configured to receive AC signal from position-detection sensor 302 by central electrode 307, and sends the AC signal strengthened by signal processing circuit 304 signal from peripheral electrode 306.

Prior art document

Patent documentation

Patent documentation 1: Jap.P. No. 4683505 publications

Utility model content

Utility model Yaos the problem of Xie Decision

, becoming more meticulous recently along with the indicating positions in position-detection sensor, the thin type to the core body (central electrode) of position indicator and the requirement for the thin type of position indicator are in increase.

But, in the position indicator 301 of above-mentioned patent documentation 1, between central electrode 307 and peripheral electrode 306, must arrange insulation division (the tapered portion 303a of framework 303), shielding part (shield member 308) and insulation division (insulation course 308a), the requirement therefore meeting this thin type is more difficult.

In addition, in position-detection sensor, put on the pen pressure of position indicator if can detect, then can carry out the process of the user making line width variation etc. according to pen pressure, therefore comparatively convenient, this live width is the live width in the line drawing of use location indicator.Therefore, be preferably configured to as position indicator: possess the pen pressure detecting unit pen putting on core body (central electrode) being compressed into row detection, and the pen pressure information detected by this pressure detecting unit is sent to position-detection sensor.

In order to carry out detecting pen pressure with such pen pressure detecting unit, need the pen pressure of the core body (central electrode) putting on position indicator to be sent to pen pressure detecting unit, therefore, the core body of position indicator (central electrode) is needed to be configured to: can move at the axis direction of position indicator and reliably transmit pen pressure.

In this case, position indicator must be set to following structure: the combination between peripheral electrode 306 and central electrode 307 diminished as far as possible, and guarantees that the thickness of core body is predetermined thickness reliably to transmit pen pressure and central electrode can move at the axis direction of position indicator.If consider thin typeization, form more difficult.

The utility model will provide a kind of position indicator that can solve above problem points as object.

For solving the means of problem

In order to solve above-mentioned problem, in the utility model,

A kind of position indicator is provided, possesses: the 1st electrode, for receiving the AC signal from position-detection sensor; And the 2nd electrode, for sending AC signal to described position-detection sensor, described position indicator carries out position instruction to described position-detection sensor, and the feature of this position indicator is to possess:

The framework of tubular, is formed as pen shape, and has peristome in the end side of axis direction;

Central electrode, is arranged in described framework with end side from the mode that the described peristome of this framework is externally given prominence to, and is made up of the bar-shaped electroconductive component of the electrode formed in described 1st electrode or described 2nd electrode;

Peripheral electrode, is arranged in the mode of surrounding around described central electrode in the described peristome side of described framework, is made up of the electroconductive component of another electrode formed in described 1st electrode or described 2nd electrode; And

Shield member, be arranged between described central electrode in described framework and described peripheral electrode, the cylindrical portion with hollow bulb is made up of electroconductive component, wherein, this hollow bulb is for receiving the part of at least being surrounded by described peripheral electrode of described central electrode

Described shield member forms insulation course at the internal face of the described cylindrical portion corresponding with the part of being surrounded by described peripheral electrode of described central electrode and outside wall surface and forms, and described cylindrical portion is electrically connected with earth terminal.

In position indicator of the present utility model,

The described cylindrical portion of described shield member is made up of aluminium, at least forms described insulation course at described internal face and outside wall surface by carrying out alumite processing.

In position indicator of the present utility model,

At least outstanding to the outside of the described framework described end side of described central electrode is coated to by the non-conductive parts that frictional resistance is less than the described electroconductive component forming this central electrode, and has the part exposing described electroconductive component in another side of described central electrode.

In position indicator of the present utility model,

In described framework, be provided with pen pressure detecting unit, wherein, described pen pressure detecting unit is pressed as pen for detecting the pressure putting on the part of giving prominence to from the described peristome of described central electrode,

Described central electrode is with can in the hollow bulb that the state of axis direction movement is accommodated in described shield member, and another side described of described central electrode directly or indirectly combines relative to described pen pressure detecting unit.

In position indicator of the present utility model,

Described pen is pressed detecting unit to possess and is clipped dielectric and opposed 2 electrodes at the axis direction of described framework, and the variable condenser changed according to the part applied pressure given prominence to the described peristome from described central electrode by described 2 interelectrode electrostatic capacitances is formed.

In position indicator of the present utility model,

Also possessing circuit part, for receiving the AC signal from described position-detection sensor received by described 1st electrode, and AC signal being supplied to described 2nd electrode,

Another side described of described central electrode is combined with the pressure transfer member for transmitting described pressure to described pen pressure detecting unit, and,

In described pressure transfer member, be provided with link, the part that this link is used for exposing another side described in described central electrode described electroconductive component is electrically connected with described circuit part.

In position indicator of the present utility model,

Described pressure transfer member is can be accommodated in the described hollow bulb of described shield member movably.

In position indicator of the present utility model,

The mode that described shield member, described pen pressure detecting unit and described circuit part are arranged in axis direction from described peristome side with the order of described shield member, described pen pressure detecting unit, described circuit part is configured in described framework,

Link for being electrically connected described central electrode and described circuit part is arranged with the mode that described pen presses detecting unit to overlap with its part,

The part of at least pressing detecting unit to overlap with described pen and this pen of described link are pressed together with detecting unit and are partly shielded, and described link with the electrical connection path of described peripheral electrode and described circuit part electrically separated configure.

In position indicator of the present utility model,

Described circuit part forms signal, and this signal has the correlativity of regulation with the described AC signal received by described 1st electrode, is sent by the signal with the correlativity of described regulation as the AC signal be sent out by described 2nd electrode.

In position indicator of the present utility model,

Between described shield member and described pen pressure detecting unit, be also provided with terminal component, this terminal component is used for being electrically connected the described cylindrical portion of described shield member and the earth terminal of described circuit part.

In position indicator of the present utility model,

The maintaining part being also provided with printed circuit board (PCB) and being made up of insulating material in described framework, wherein, described printed circuit board (PCB) is provided with described circuit part,

Described shield member and described pen pressure detecting unit are configured in described maintaining part, and described maintaining part is fixed relative to described printed circuit board (PCB).

In position indicator of the present utility model,

Also possesses tabular terminal plate, the electroconductive component be electrically connected with the circuit part of described printed circuit board (PCB) by an end is formed, this tabular terminal plate is set to a described end side and is fixed on described maintaining part, and the other end of this tabular terminal plate with axis direction crisscross on can flexibly displacement

Can described the other end of flexibly displacement flexibly contacting with described peripheral electrode of described tabular terminal plate, thus be electrically connected with this peripheral electrode.

In position indicator of the present utility model,

Possess transmitting element, described transmitting element presses data to send being pressed the described pen pressure detected by detecting unit by described pen to the position detecting device being arranged at described position-detection sensor as pen.

In the position indicator of this utility model based on said structure, in the direction orthogonal with axis direction, the shield member formed at internal face and outside wall surface formation insulation course is between central electrode and peripheral electrode, wherein, this internal face and outside wall surface are internal face and the outside wall surface of the part of the central electrode at least surrounded by described peripheral electrode of the cylindrical portion be made up of conductive component.By this shield member, realize the insulation between central electrode and peripheral electrode and shielding (being mainly electrostatic screening).

Therefore, based in the position indicator of this utility model, between central electrode and peripheral electrode, due to the shield member only configuring and be formed at by insulation course and internal face and outside wall surface are formed can be formed in, therefore, it is possible to be easy to the thin type realizing position indicator.

And, in this utility model, preferably, the described cylindrical portion of described shield member is made up of aluminium, by carrying out alumite processing to this aluminium, thus on the internal face and outside wall surface of the part of being surrounded by described peripheral electrode of central electrode, at least form the structure of insulation course.

Utility model effect

According to this utility model, can to be set between central electrode and peripheral electrode at least only configure at the internal face of the part of being surrounded by described peripheral electrode of central electrode and outside wall surface be formed with insulation course and the structure of the shield member formed, therefore, it is possible to be easy to the thin type realizing position indicator.

Accompanying drawing explanation

Fig. 1 is the figure of example of the electronic equipment for illustration of the position indicator using embodiment of the present utility model.

Fig. 2 is the figure of the structure example that the position-detection sensor used together with the position indicator of embodiment of the present utility model is shown.

Fig. 3 is the figure of the summary of the structure example of the position indicator of embodiment for illustration of this utility model.

Fig. 4 is the figure of the electric structure example of the position indicator of embodiment for illustration of this utility model.

Fig. 5 is the sectional view of the major part of the position indicator of embodiment for illustration of this utility model.

Fig. 6 is the figure illustrated under the state after the main structure member assembling of the framework inside storage of the position indicator by the embodiment in this utility model.

Fig. 7 is the exploded perspective view of the main parts in the structure member group of Fig. 6.

Fig. 8 is the figure representing the state after assembling main structure member group shown in Figure 7.

Fig. 9 is the A-A line sectional view of Fig. 6.

Figure 10 is the figure of the summary for illustration of the position indicator as object of the present utility model.

Figure 11 is the figure of the structure example in the past of the major part of the position indicator represented as object of the present utility model.

Embodiment

Below, with reference to figure, while be described the embodiment of the position indicator based on this utility model.

Fig. 1 represents an example of the panel computer type information terminal 200 of the example of the electronic equipment of the position indicator 100 as the embodiment using this utility model.In this embodiment, panel computer type information terminal 200 such as possesses the display frame 200D of the display device of LCD (LiquidCrystalDisplay: liquid crystal display) etc., possesses the position-detection sensor 201 of electrostatic capacitive on the top (face side) of display frame 200D.

[structure example of position-detection sensor 201]

The position-detection sensor 201 of the electrostatic capacitive of this example, is described as follows, and sensor electrode is made up of input electrode and output electrode, is the mutual capacitance type position-detection sensor detected in conjunction with the change of electric capacity to the point that position indicator 100 contacts.

Be described with reference to the position-detection sensor 201 of Fig. 2 to the electrostatic capacitive of this example.That is, as shown in Figure 2, the position-detection sensor 201 of this example is made up of sensor part 210, sending part 211 and acceptance division 212.Sensor part 210 possesses: multiple transmission conductors of the rectilinear form that the transverse direction (X-direction) to indicative input face extends, and is 64 in this example and sends conductor 213Y ₁, 213Y ₂..., 213Y ₆₄, and with this transmission conductor 213Y ₁~ 213Y ₆₄multiple reception conductors that are orthogonal, that extend to the longitudinal direction (Y direction) in indicative input face, are 64 in this example and receive conductor 214X ₁, 214X ₂..., 214X ₆₄.Multiple transmission conductor 213Y ₁~ 213Y ₆₄equally spaced configure in Y direction, and be connected with sending part 211.In addition, multiple reception conductor 214X ₁~ 214X ₆₄equally spaced configure in X-direction, and be connected with acceptance division 212.

In addition, in this specification, to sending in the explanation of conductor, conductor 213Y is being sent without the need to distinguish being 64 ₁~ 213Y ₆₄which time, be called and send conductor 213Y.Equally, to receiving in the explanation of conductor, conductor 214X is being received without the need to distinguish being 64 ₁~ 214X ₆₄which time, be called and receive conductor 214X.

Multiple transmission conductor 213Y are such as formed at the face of the downside of substrate.Multiple reception conductor 214X are formed at the face of the upside of substrate.Therefore, multiple transmission conductor 213Y and multiple reception conductor 214X is separated by predetermined interval and being oppositely disposed, and possesses mutually orthogonal configuration relation, forms multiple intersection point (point of crossing).Further, can think that sending conductor 213Y in each point of crossing combines via predetermined electrostatic capacitance with reception conductor 214X.

Sending part 211 provides predetermined AC signal to transmission conductor 213Y.In this case, sending part 211 can to multiple transmission conductor 213Y ₁, 213Y ₂, 213Y ₆₄carry out one by one successively switching and same AC signal being provided, also can to multiple transmission conductor 213Y ₁, 213Y ₂, 213Y ₆₄mutually different multiple AC signal are provided simultaneously.In addition, also can by multiple transmission conductor 213Y ₁, 213Y ₂, 213Y ₆₄be divided into multiple groups, use different AC signal to each group.

Acceptance division 212 is sent to each to the AC signal provided by transmission conductor 213Y via described predetermined electrostatic capacitance and receives conductor 214X ₁, 214X ₂, 214X ₆₄signal content detect.If between transmission conductor 213Y and reception conductor 214X is equal in conjunction with electrostatic capacitance on all point of crossing, when then position indicator 100 does not exist in sensor part 210, then detect the whole reception conductor 214X from sensor part 210 at acceptance division 212 ₁, 214X ₂, 214X ₆₄the Received signal strength of predetermined level.

On the other hand, if position indicator 100 contacts with sensor part 210, then the transmission conductor 213Y forming the point of crossing of its contact position is combined by electrostatic capacitance with reception conductor 214X and this position indicator 100.That is, because this position indicator 100 causes electrostatic capacitance change, thus change compared with the received signal level of other point of crossing from the received signal level that the reception conductor 214X of the point of crossing that position indicator 100 exists obtains.

Acceptance division 212 passes through at multiple reception conductor 214X ₁, 214X ₂, 214X ₆₄in, the reception conductor 214X signal level of its Received signal strength being existed to change detects, thus detects the position of position indicator 100.And, eliminate the control part of illustrated position-detection sensor 201 by detecting the reception conductor 214X of the signal level variation being provided the transmission conductor 213Y of AC signal by sending part 211 and there is Received signal strength at acceptance division 212, thus detect the point of crossing of position indicator 100 contact.

Here, position-detection sensor 201, when not being position indicator 100 but point close to or touch in sensor part 210, also can detect its finger point of crossing that is close or that touch.In the case, by sending a part for the AC signal that conductor 213Y provides by finger or the people's direction of flow earth terminal by user, cause the signal level variation of the Received signal strength of the reception conductor 214X forming the point of crossing that finger exists, therefore acceptance division 212 is by detecting the change of the signal level of this Received signal strength, thus can detect the reception conductor 214X forming the point of crossing that finger exists.

When position indicator is position indicator 100 of pen shape (stylus shape), also identical with the principle that the position of finger is detected, position-detection sensor 201 can carry out the detection of the indicating positions of sensor part 210.But, when position indicator is position indicator 100 of pen shape, because the contact area compared with the situation of finger and between position-detection sensor 201 is less, therefore less in conjunction with electric capacity, the detection sensitivity that the position of position-detection sensor 201 is detected is lower.

But, preferably position indicator 100 when, as previously mentioned, receive the AC signal from position-detection sensor 201, carry out processing in signal processing circuit and after strengthening signal, feed back to position-detection sensor 201.Therefore, position-detection sensor 201 can detect with the contact position of high sensitivity to position indicator 100.

[structure example of the position indicator 100 of embodiment]

The summary > of the structure example of < position indicator 100

Be described with reference to the summary of Fig. 3 and Fig. 4 to the position indicator 100 of this embodiment.This position indicator 100 possesses by conductive material, such as SUS (SteelSpecialUseStainless: stainless steel) and form the framework 1 of tubular.At the peristome of the end side of the nib side of the pen shape of this framework 1, be provided with by conductive material, such as SUS and the peripheral electrode 2 formed via insulating sleeve 3.Insulating sleeve 3 for insulating with the framework 1 and peripheral electrode 2 of electric conductivity, such as, is made up of insulative resin.

Further, as shown in Figure 4, in the inside of the end side of the nib side of framework 1, central electrode 5 configures with the state being accommodated in shield member 6.Shield member 6 for shielding central electrode 5, and for guaranteeing the insulation of central electrode 5 and peripheral electrode 2.In this case, the leading section 5a being set to such as central electrode 5 externally gives prominence to from the peristome of an end of the nib side of framework 1, and the leading section 6a of shield member 6 externally exposes from the peristome of an end of the nib side of framework 1.

Fig. 3 be using a part for the framework 1 of the tubular of the position indicator 100 of this embodiment as section, the figure of the state that the part in the hollow bulb of this framework 1 externally exposes is shown.As shown in Figure 3, the opposition side of the nib side of framework 1 is inaccessible by cap 4 institute, and in the hollow bulb 101a of the framework 1 of tubular, be accommodated with the printed circuit board (PCB) 21 of (omitting diagram in Fig. 3) such as configuration signal treatment circuits.Further, between printed circuit board (PCB) 21 and cap 4, the battery 22 that supply voltage is provided to signal processing circuit etc. is accommodated with.In this example, in order to change battery 22, cap 4 is set to detachable.

Fig. 4 is the figure of the electrical connection of the circuit example of configuration in the printed circuit board (PCB) 21 of the position indicator 100 illustrated preferably and each parts of position indicator 100.As shown in Figure 4, in the position indicator 100 of this embodiment, in printed circuit board (PCB) 21, be provided with signal processing circuit 401, IC (IntegratedCircuit: integrated circuit) 402 and wireless transmission circuit 403.In addition, be also provided with power circuit, but omit in the diagram at printed circuit board (PCB) 21, this power circuit provides supply voltage from the voltage from battery 22 to these signal processing circuit 401, IC402 and wireless transmission circuit 403.

Further, in this embodiment, be configured to the input end of central electrode 5 with signal processing circuit 401 to be electrically connected, and be configured to the output terminal of signal processing circuit 401 to be electrically connected with peripheral electrode 2.In this embodiment, in signal processing circuit 401, after phase reversal is carried out to the AC signal (current signal) of the input via central electrode 5, such as, after using transformer boost (multiplication) to strengthen signal, be provided to peripheral electrode 2 as voltage signal.

Therefore, the AC signal fed back to the sensor part 210 of position-detection sensor 201 from the peripheral electrode 2 of position indicator 100 is to the anti-phase signal after being strengthened by the AC signal sending conductor 213Y and provide, so, the effect that the change of the AC signal that position indicator 100 plays in the Received signal strength making the reception conductor 214X of position-detection sensor 201 increases further.Therefore, position-detection sensor 201 can with the contact position of high-sensitivity detection position indicator 100.

In addition, in this embodiment, the framework 1 of position indicator 100 is made up of the SUS of conductive material, and is connected with the not shown earth conductor formed in the printed circuit board (PCB) 21 being provided with signal processing circuit 401.Therefore, the framework 1 of AC signal by position indicator 100 provided by transmission conductor 213Y in position-detection sensor 201 and the human body by user flow (dotted line with reference to Fig. 4) to earth terminal, thus can realize the more stabilization of input action.

Further, as shown in Figure 4, in this embodiment, the cylindrical body 61 that shield member 6 can be set to be made up of conductive material is covered the structure comprising the outside wall surface of cylindrical body 61 and the full surface of internal face by insulation course 62.But as will be described later, a part for shield member 6 makes the outside wall surface 61a of the cylindrical body 61 of conductive material expose as the part not forming insulation course 62.The part that this outside wall surface 61a exposes can be considered as the terminal part be electrically connected with the earth conductor of printed circuit board (PCB) 21.By the insulation course 62 of shield member 6, realize electrical isolation between central electrode 5 and peripheral electrode 2, and the cylindrical body 61 of the conductive material of shield member 6 is connected with earth conductor, thus realizes the electrostatic screening between central electrode 5 and peripheral electrode 2.

In addition, in this embodiment, as shown in Figure 4, in the hollow bulb 101a of the framework 1 of position indicator 100, the pen pressure detecting unit 10 applied pressure, i.e. pen on the central electrode 5 forming core body being compressed into row detection is provided with.As will be described later, this pressure detecting unit 10 accepts by pressure transfer member 7 the pen pressure putting on central electrode 5, can be considered as the structure of the variable variable condenser Cv of electrostatic capacitance.As shown in Figure 4, central electrode 5 is combined with pressure transfer member 7, is contained in the hollow bulb of cylindrical body 61 of shield member 6 with the state be free to slide.

Further, two electrodes of the variable condenser Cv pressing detecting unit 10 to form by pen are connected with IC402.IC402 calculates the pen pressure putting on position indicator 100 from the value of the electrostatic capacitance of variable condenser Cv.Further, the pen pressure calculated is transformed to transmission data by IC402, is sent to position-detection sensor 201 by wireless transmission circuit 403.Wireless transmission circuit 403 sends means by the near radio of such as bluetooth (registered trade mark) specification etc. and forms.Position-detection sensor 201 receives the transmission data of this pressure and decodes, and compresses into row detect the pen putting on position indicator 100.

The detailed construction example > of the major part of < position indicator 100

Fig. 5 is the sectional view of the detailed construction example of the nib side of the position indicator 100 that this embodiment is shown, corresponding with cross sectional portion unshowned in Fig. 3.The state cut off by the face of the cental axial position comprising the cylindrical body forming framework 1 stereographic map of the nib side of position indicator 100 is shown, so that easy to understand more at this Fig. 5.

In addition, Fig. 6 is with the figure shown in state after assembling by the parts group of receiving in the hollow bulb of the framework 1 of tubular.In addition, Fig. 7 is the exploded perspective view of critical piece in the parts group of this Fig. 6.And Fig. 8 is the figure to the state after the main parts group assembling shown in Fig. 7 being represented.Fig. 9 is the A-A line sectional view of Fig. 6.

As shown in Figure 5, insulating sleeve 3 has the outer peripheral face 3a of the conical by its shape formed in the mode attenuated at leisure to nib side, and is formed as the shape of the frustum of a cone with through hole 3b, and this through hole 3b makes the shield member 6 of shielding central electrode 5 insert and through.The nib side of this through hole 3b is in order to be combined with peripheral electrode 2, and while some greatly for the change of its footpath, the internal face in the nib side of this through hole 3b forms the threaded portion 3c for making peripheral electrode 2 be threaded.And insulating sleeve 3 possesses the end face of the large diameter portion of the opposition side from the nib side teat 3d outstanding to axis direction.Further, insulating sleeve 3 is pressed into the open end portion of the nib side of the framework 1 of tubular by this teat 3d, thus is fixed on framework 1.In addition, 3e is rosette, when insulating sleeve 3 is pressed into and is fixed on framework 1, is clipped between insulating sleeve 3 and framework 1 and is fixed.

Peripheral electrode 2 is made up of the SUS of the example as conductive material, there is the outer peripheral face 2a being formed as conical by its shape in the mode be connected with the outer peripheral face 3a of insulating sleeve 3, and be formed as the truncated cone shape with through hole 2b, this through hole 2b makes the shield member 6 of receive center electrode 5 insert and through.In addition, the opposition side of the nib side of peripheral electrode 2 is provided with the teat 2c outstanding to axis direction.Further, the threaded portion 2d be threaded with the threaded portion 3c of insulating sleeve 3 is formed at the teat 2c of this peripheral electrode 2.

The mode that the through hole 2b of peripheral electrode 2 becomes minimum diameter with the diameter of nib side part is formed, and its minimum diameter is chosen to be compared with the external diameter of the nib side part of shield member 6 some greatly.And, internal diameter the earth compared with minimum diameter of the side of the formation threaded portion 2d of the through hole 2b of peripheral electrode 2 is formed, as will be described later, can make terminal plate 9 (with reference to Fig. 6) be located at this through hole 2b compared with in the space between large diameter part and shield member 6, this terminal plate 9 is for carrying out the electrical connection of signal processing circuit and the peripheral electrode 2 configured at printed circuit board (PCB) 21.

Central electrode 5, as shown in Fig. 5, Fig. 7 and Fig. 8, possesses with the conductive material forming such as 1.9mm diameter, the core body 51 that is such as made up of metal.Further, in this embodiment, central electrode 5 passes through by Ins. ulative material, and the guard block 52 formed for POM (Polyoxymethylene: polyoxymethylene) in this example covers about 1/2nd of the nib side of core body 51.The part covered by the guard block 52 of this core body 51 is when assembling as position indicator 100, and peripheral electrode 2 is for being positioned at the state around it.Further, as shown in Fig. 5 and Fig. 8, core body 51 has spherical mode with leading section and is formed, and guard block 52 is formed in the mode of the entirety covering the spherical leading section of this core body 51, forms the leading section 5a of central electrode 5.This guard block 52 has to be avoided the indicative input face of damage position detecting sensor 201 and increases the effect becoming large effect with the contact area in indicative input face and further enhance the insulation relative to shield member 6 and peripheral electrode 2 in this embodiment especially.

The cylindrical body 61 be made up of the conductive material forming shield member 6, in this embodiment, the aluminium processed by alumite is formed.Further, as shown in Fig. 5 and Fig. 8, form insulation course 62 by alumite film, this alumite film comprises the mode on the outside wall surface 61a of cylindrical body 61 and the full surface of internal face 61b with covering and is formed.

Wherein, the alumite processing of cylindrical body 61, as shown in Fig. 6 and Fig. 7, does not form insulation course 62 in terminal part 63, and is formed in the mode that the outside wall surface 61a being made up of cylindrical body 61 conductive material exposes.The electrical connection terminal part 63 of cylindrical body 61 and the earth conductor (earth terminal) of printed circuit board (PCB) 21, form the electric field shielding of central electrode 5 by cylindrical body 61.Add man-hour carrying out alumite to such as cylindrical body 61, this terminal part 63 can be formed by shielding film.In addition, after alumite processing, also can remove the alumite film of this terminal part 63, the outside wall surface 61a of cylindrical body 61 is exposed.

In this embodiment, as used, Fig. 4 is described, in the hollow bulb of the cylindrical body 61 of shield member 6, at central electrode 5 and pressure transfer member 7 with under the state combined, be contained in the mode of axis direction movement in this hollow bulb with central electrode 5.Pressure transfer member 7 can be considered as the parts compared with central electrode 5 with larger diameter.

Therefore, the cylindrical body 61 of shield member 6, as shown in Fig. 5 and Fig. 8, is formed: mainly have minor diameter part 64 in nib side, it has the internal diameter can received movably at axis direction by central electrode 5 in the following manner; Have large-diameter portion 65 in the opposition side of nib side, it has the internal diameter can received movably at axis direction by pressure transfer member 7.

The internal diameter of the hollow bulb of minor diameter part 64 is chosen to be more some greatly than the external diameter (forming the diameter of the part of guard block 52 on core body 51) of central electrode 5.In addition, to be chosen to be the maximum gauge of specific pressure transfer member some greatly for large-diameter portion 65.Therefore, in the hollow bulb of cylindrical body 61, form stage portion 66 in the part changed from minor diameter part 64 to large-diameter portion 65.In addition, in the circumferential lateral surface of cylindrical body 61, be also formed with stage portion 67 in the part changed from minor diameter part 64 to large-diameter portion 65.

Pressure transfer member 7 is made up of Ins. ulative material, is made up of in this example resin.As shown in Fig. 5, Fig. 7 and Fig. 8, there is the chimeric teat 72 having the core body fitting portion 71 of the end 51b of the core body 51 of central electrode 5 and press detecting unit 10 chimeric with pen.The core body fitting portion 71 of pressure transfer member 7 forms recess 71a and forms in cylindrical shape parts, wherein, recess 71a insert by the end 51b of the core body 51 of central electrode 5.Further, as shown in Figure 7, in a part for the lateral circle surface of this core body fitting portion 71, the groove 71b from peristome side to the sidewall of base cuts recess 71a is formed with at axis direction.As shown in Fig. 5 and Fig. 8, teat 72 and the pen of pressure transfer member 7 press detecting unit 10 to be combined to transmit pen pressure.

Further, as shown in Figure 7 and Figure 8, in recess 71a, be provided with the terminal plate 73 of the electrical connection of the signal processing circuit 401 for carrying out central electrode 5 and printed circuit board (PCB) 21.This terminal plate 73 is made up of sheet metal, as shown in Figure 7 and Figure 8, configures, and possess in recess 71a with the state that the direction orthogonal with axis direction is opposite: a pair the 1st terminal plate 73a, extend to form to axis direction; And the 2nd terminal plate 73b, arranged in the mode that the direction that the circumferential lateral surface to the core body fitting portion 71 with pressure transfer member 7 is orthogonal is outstanding by groove 71b.Further, the 1st terminal plate 73a of a pair is in the direction orthogonal with axis direction can the mode of elastic displacement be formed, and its interval configures in mode that is identical with core body 51 footpath or stenosis slightly.

The core body 51 of central electrode 5 inserts in the recess 71a of the core body fitting portion 71 of (press-in) pressure transfer member 7 by its end 51b, thus be combined with pressure transfer member 7, the pen pressure putting on core body 51 is sent to pen described later pressure detecting unit 10 via pressure transport unit 7.That is, between a pair the 1st terminal plate 73a of the end 51b of the core body 51 of central electrode 5 in the recess 71a of core body fitting portion 71, the elastic displacement power of both resistances and being pressed into.So the core body 51 of central electrode 5 as shown in Figure 8, is flexibly clamped by 1 couple of terminal plate 73a, thus, central electrode 5, engaging in pressure transfer member 7, if can be considered as predetermined power extracting, then can not remove the locking state with pressure transfer member 7.

As above, the combination that central electrode 5 and pressure transfer member 7 combine can be contained in the state of axis direction movement in the cylindrical body 61 of shield member 6.Further, because the core body fitting portion 71 of pressure transfer member 7 is fastened on the stage portion 66 of the hollow bulb of the cylindrical body 61 of shield member 6, so central electrode 5 and pressure transfer member 7 can be avoided to come off in nib side.But if only apply power to extract central electrode 5, then the end 51b of core body 51 and the flexible clamping of the 1st terminal plate 73a are removed, thus can extract central electrode 5 from pressure transfer member 7.That is, becoming can the structure of switching centre's electrode 5.

Then, following, pen pressure detecting unit 10 is described.Because the pen pressure detecting unit 10 of this example uses such as patent documentation: the pen pressure detecting unit of the well-known structure recorded in JP 2011-186803 publication, therefore forms electrostatic capacitance compresses into row change variable condenser according to the pen putting on central electrode 5.

The pen pressure detecting unit 10 of this example is as shown in Fig. 5 and Fig. 8, by Ins. ulative material, such as, receive multiple parts in the case member 11 that resin is formed and form, the plurality of parts are: dielectric 12, conductive component 13, elastomeric element 14, holding member 15 and terminal component 16.This terminal component 16 forms the 1st electrode of variable condenser, and wherein, this variable condenser forms pen pressure detecting unit 10.In addition, conductive component 13 and elastomeric element 14 are electrically connected and form the 2nd electrode of variable condenser.

Case member 11 is made up of the cylindrical body possessing hollow bulb, and case member 11 is set to the structure in empty portion wherein, holding member 15, elastomeric element 14, conductive component 13, dielectric 12 and terminal component 16 being arranged in axis direction to receive.Dielectric 12 and terminal component 16 are can not fix in the mode of axis direction movement relative to case member 11 and arrange.

Further, holding member 15 with relative to case member 11 can movement on axis direction state arrange.The end face of the nib side of this holding member 15 is provided with recess 15a, and this recess 15a is fitted together to the teat 72 of pressure transfer member 7.And, the recess 15a of this holding member 15 is embedded in by being pressed into by the teat 72 of pressure transfer member 7, thus according to putting on the pen pressure of central electrode 5, the entirety of central electrode 5, pressure transfer member 7 and holding member 15 is moved on axis direction.

Further, the end face of the opposition side of the end face of the described recess 15a of the formation of holding member 15 combine and keep conductive component 13.This conductive component 13 is by having electric conductivity and can parts, the such as elastomeric element of silicon conductive rubber and pressured conductive rubber etc. of elastic deformation forming.In addition, elastomeric element 14 is made up of the volute spring such as with electric conductivity, has flexible winder and has terminal plate (omitting diagram) in an end of this winder, have connecting portion 14a in the other end of winder.

Elastomeric element 14 is to combine the mode that the surrounding being kept the conductive component 13 that parts 15 keep surrounds by its winder.Now, the connecting portion 14a of elastomeric element 14 and the end contact of conductive component 13, become the state of electrical connection.Further, the end of the opposition side of the connecting portion 14a of elastomeric element 14 and terminal plate (omitting diagram) are formed in the mode of welding with the conductive pattern of printed circuit board (PCB) 21.

In addition, terminal component 16 is formed (omit and illustrate) in the mode be electrically connected with the conductive pattern of printed circuit board (PCB) 21.

In pen pressure detecting unit 10 as constructed as above, if apply pen pressure at central electrode 5, then this pressure transmits via the holding member 15 of pressure transfer member 7 to pen pressure detecting unit 10, and holding member 15, according to the pen pressure applied, makes conductive component 13 move to dielectric 12 side.So the end of conductive component 13 abuts with dielectric 12, press and change with the contact area of conductive component 13 according to the pen applied, the electrostatic capacitance of the variable condenser formed between the 1st electrode and the 2nd electrode is variable according to the pen pressure applied.

And, as previously mentioned, the position indicator 100 of this embodiment is compressed into row according to the electrostatic capacitance of the variable condenser forming pen pressure detecting unit 10 to the pen putting on this position indicator 100 by IC402 and is detected, and is sent the information of the pen pressure that this detects by wireless transmission circuit 403.

[connection of the input end of central electrode 5 and signal processing circuit 401]

The terminal plate 73 arranged at pressure transfer member 7 is for central electrode 5 with to the parts that are electrically connected of signal processing circuit arranged on printed circuit board (PCB) 21.By end 51b and 1 flexibly the contacting the 1st terminal plate 73a of the core body 51 of central electrode 5, thus central electrode 5 is electrically connected with terminal plate 73.

As shown in Figure 7 and Figure 8, the length setting of the 2nd terminal plate 73b of terminal plate 73 is the protruding outside length of its front end to the case member 11 of pen pressure detecting unit 10.Further, the front end of the 2nd terminal plate 73b of this terminal plate 73, as shown in Fig. 7 and Fig. 9, is provided with the notch of V-shape or U-shaped.

Further, as shown in FIG. 8 and 9, weld at the V-shape of front end of the 2nd terminal plate 73b or the notch of U-shaped one end to the connecting line 23 be such as made up of copper cash.The other end of this connecting line 23 eliminates diagram, and the other end of this connecting line 23 welds etc. with conductive pattern, and this conductive pattern is connected with the input end of the signal processing circuit 401 being arranged at printed circuit board (PCB) 21.

In pressure transfer member 7, the 2nd terminal plate 73b of the terminal plate 73 of storage is formed in the mode protruding outside of the case member 11 to pen pressure detecting unit 10, therefore the entirety of connecting line 23 to the pen pressure detecting unit 10 between printed circuit board (PCB) 21 and pressure transfer member 7 is carried out roundabout, and is arranged on the position be connected with printed circuit board (PCB) 21 the 2nd terminal plate 73b of connecting terminal plate 73.

[cylindrical body 61 of shield member 6 and the connection of earth conductor]

Then, the structure of the connection for the cylindrical body 61 of shield member 6 and the earth conductor of printed circuit board (PCB) 21 is described.That is, as previously mentioned, the cylindrical body 61 forming the conductive material of shield member 6 needs to be electrically connected with the earth conductor of printed circuit board (PCB) 21.Owing to being electrically connected earth conductor and the framework 1 of printed circuit board (PCB) 21, therefore user holds framework when operating position indicator 100, and earth conductor is connected with greatly (earth terminal) via human body, plays good shield effectiveness.

As shown in Fig. 5, Fig. 6 and Fig. 9, in this embodiment, shield member 6 and pen pressure detecting unit 10 are arranged at keeper 30.This keeper 30 possesses cylindrical body 61 with the such shape of the so-called round log boat cut off along the face of its axis direction.And, the part of the collecting shield member 6 of keeper 30 is configured to possess the recess shapes corresponding with the outer shape of this shield member 6, and the part of accommodating pen pressure detecting unit 10 is configured to possess the recess shapes of pressing the outer shape of the case member 11 of detecting unit corresponding with this.

In addition, in this example, as shown in figs.5 and 6, shield member 6 by the stage portion 67 formed in the outside wall surface 61a side of its cylindrical body 61 being engaged with the stage portion 31 formed at keeper 30, thus is avoided moving on axis direction in keeper 30.In addition, pen pressure detecting unit 10 can not move this situation with shield member 6 at axis direction and combine, and is provided with the recess corresponding with its outer shape in order to avoid moving at axis direction.And, as shown in Figure 5, keeper 30 is by docking with insulating sleeve 3, thus restriction keeper 30 moves to the peristome side of the nib side of framework 1, and be combined with this keeper 30 and fixing printed circuit board (PCB) 21 via battery 22 incorporating section partes tegmentalis 4 fix, thus also limit and move to cap 4 side.

Further, as shown in Figure 6, in this example, be formed with arm 21a, 21b in an end of the length direction of printed circuit board (PCB) 21, this arm 21a, 21b length direction from the both ends in the direction orthogonal with described length direction to this printed circuit board (PCB) 21 extends.Further, arm 21a, 21b of this printed circuit board (PCB) 21 are engaged by the part of the open end to the part that pen presses detecting unit 10 to receive with keeper 30, thus in keeper 30 fixed printed circuit board 21.

In this case, omit diagram, form conductive pattern at arm 21a, this conductive pattern is used for being connected with the output terminal of the signal processing circuit 401 arranged on printed circuit board (PCB) 21, forms the conductive pattern being used for being connected with the earth conductor of printed circuit board (PCB) 21 at arm 21b.

Further, in this embodiment, as shown in Fig. 5, Fig. 6, Fig. 8 and Fig. 9, the looped end sub-pieces 8 shown in Fig. 7 is arranged between the case member 11 of pressure transfer member 7 and pen pressure detecting unit 10.In this case, looped end sub-pieces 8 is set to the size substantially same with the end face of the case member 11 of tubular and shape.Further, the teat 72 of pressure transfer member 7 inserts and the annular space 8a of through looped end sub-pieces 8, and looped end sub-pieces 8 is pressed the end face of the case member 11 of detecting unit 10 to clamp by the end difference formed between core body fitting portion 71 and teat 72 and pen.

Further, in this looped end sub-pieces 8, the position corresponding with terminal part 63 is formed with connection projection 8b, 8c, wherein, this terminal part 63 refers to the part that the outside wall surface 61a of the cylindrical body 61 being arranged at shield member 6 exposes.In addition, the terminal part 63 of cylindrical body 61 is formed in 2 positions of 180 degree of mutually opposing angular spacings separation, is formed accordingly is connected with projection 8b, 8c with these 2 terminal parts 63.In addition, in looped end sub-pieces 8, also form the connection projection 8d being used for being connected with conductive pattern, wherein, this conductive pattern is connected with the earth conductor of the arm 21b being formed at printed circuit board (PCB) 21.

Further, as shown in Fig. 6 and Fig. 9, connection projection 8b, the 8c of looped end sub-pieces 8 are welded on this outside wall surface 61a with the state contacted with the outside wall surface 61a of cylindrical body 61, and wherein, the outside wall surface 61a of cylindrical body 61 exposes at terminal part 63 place of shield member 6.In addition, as shown in Fig. 6 and Fig. 9, the connection of looped end sub-pieces 8 is welded with the state be connected with the earth conductor of the arm 21b being formed at printed circuit board (PCB) 21 with projection 8d.By more than, the cylindrical body 61 be made up of the conductive material of shield member 6 is connected with the earth conductor of printed circuit board (PCB) 21, realizes electric field shielding.

[connection of the output terminal of peripheral electrode 2 and signal processing circuit 401]

Then, the structure of the electrical connection between the output terminal of the signal processing circuit 401 for peripheral electrode 2 and printed circuit board (PCB) 21 is described.

That is, as shown in Figure 7, in this embodiment, such as, utilize and have flexible sheet metal, the terminal plate 9 preparing peripheral electrode 2 is as can the shape of elastic displacement in its thickness of slab direction.This peripheral electrode 2 with the end side of length direction of terminal plate 9 be formed with the connection projection 9a be connected with conductive pattern, wherein, the arm 21a that this conductive pattern is formed in printed circuit board (PCB) 21 is connected with the output terminal of signal processing circuit 401.On the other hand, this peripheral electrode 2 with another side of length direction of terminal plate 9 formed and use end 9b with connecting of flexibly contacting of the internal face of peripheral electrode 2.

This peripheral electrode 2 with terminal plate 9 chimeric with the concave part (omit and illustrate) formed at keeper 30 by connecting with projection 9a side, be secured in keeper 30.Further, as shown in Figure 6, the terminal plate 9 of this peripheral electrode 2 is fixed in the mode of the outside wall surface of the housing recess of the shield member 6 along keeper 30, with the direction making its length direction and axis direction become same.Therefore, when peripheral electrode 2 is threaded with insulating sleeve 3, the internal face of peripheral electrode 2 flexibly contacts with the connection end 9b of terminal plate 9, and is electrically connected.

[being separated between connecting line 23 and the terminal plate 9 of peripheral electrode 2]

In this embodiment, the connecting line 23 between the input terminal of the signal processing circuit 401 of central electrode 5 and printed circuit board (PCB) 21, for the signal processing circuit to peripheral electrode 2 and printed circuit board (PCB) 21 output terminal between the terminal plate 9 of electrical connection form the signal line of Received signal strength respectively and send the signal line of signal.Further, connecting line 23 and terminal plate 9 are all to cross over pen press the mode of detecting unit 10 to arrange along axis direction.Therefore, send between signal and Received signal strength and mutually disturb, the risk that location indicator 100 can not stably work.

In view of this point, in this embodiment, illustrate as follows for preventing sending the interference produced between signal and Received signal strength.

1st, in the hollow bulb of the framework 1 of position indicator 100, using the allocation position of the connecting line 23 of the signal line as Received signal strength and the position i.e. 180 degree of positions deviated from be separated the farthest allocation position of the terminal plate 9 forming the signal line sending signal being placed at the circumference of the hollow bulb of framework 1.

2nd, in this embodiment, the connecting line 23 of the signal line as Received signal strength is separated with terminal plate 9 and shields (electromagnetic screen).That is, as shown in Fig. 5 and Fig. 9, the mode that the copper strips 40 formed in order to the face being used in rolled copper foil 41 forms insulating coating 42 covers connecting line 23 is arranged.Now, be that the state of connecting line 23 side is along pressure detecting unit 10 of beginning to write to configure copper strips 40 with insulating coating 42.As shown in Figure 9, in this embodiment, connecting line 23 carries out roundabout mode with the pen pressure detecting unit 10 kept storage in keeper 30 and is arranged in the groove portion 32 of a part for all sides being formed at keeper 30.

Further, in this embodiment, one end 41a of rolled copper foil 41 welds with the arm 21b of the printed circuit board (PCB) 21 being fixed on keeper 30, thus copper strips 40 is connected with the earth conductor being formed at arm 21b.In this case, as shown in Figure 9, the length of the circumference of copper strips 40 can be set to such length of the about 180 degree of angular regions covered from the part of the arm 21b of printed circuit board (PCB) 21 to the allocation position close to terminal plate 9.In addition, the scope of the axis direction covered by copper strips 40 can be set to the entirety of the axis direction of the incorporating section of the pen pressure detecting unit 10 comprising keeper 30, and until the length of the part of the arm 21b root of printed circuit board (PCB) 21.

By above structure, signal line connecting line 23 between central electrode 5 and signal processing circuit 401 input end being formed Received signal strength by the shielding of copper strips 40 and the signal line of the transmission signal of the output terminal of signal processing circuit 401 be made up of peripheral electrode 2 electrically separated, thus can suppress to send the interference between signal and Received signal strength.

[effect of embodiment]

As mentioned above, in the position indicator 100 of this embodiment, shield member 6 carries out alumite processing by the entirety (removing terminal part 63) to the cylindrical body 61 be made up of aluminium, thus forms in the entirety of the outside wall surface 61a and internal face 61b that comprise cylindrical body 61 insulation course 62 be made up of alumite film.Further, the earth conductor of the aluminium be made up of conductive material in terminal part 63 with printed circuit board (PCB) 21 is connected, thus realizes electric field shielding.

Therefore, according to this embodiment, insulation between central electrode 5 and peripheral electrode 2 and shielding can be realized by means of only shield member 6, and thin type can be carried out to nib side.And central electrode 5 can be formed in the mode covered by the entirety of shield member 6, therefore, it is possible to carry out thinner type to central electrode 5.

Further, in this embodiment, by form central electrode 5 core body 51 peripheral electrode 2 and surround part in be provided with guard block 52, the insulation therefore between central electrode 5 and peripheral electrode 2 is strengthened further.

In addition, in this embodiment, in order to transmit pressure to pen pressure detecting unit 10, not use central electrode 5 self, but via pressure transfer member 7, even if therefore carry out thin type to central electrode 5, by pressure transfer member 7, also play and detecting unit 10 can be pressed reliably to transmit the effect of pen pressure to pen.

Further, according to this embodiment, central electrode 5 freely plugs relative to pressure transfer member 7, and therefore also having can the such effect of switching centre's electrode 5.

And, in this embodiment, the signal line that there is the Received signal strength be made up of the connecting line 23 between central electrode 5 and the input end of signal processing circuit 401 in the hollow bulb of framework 1 and the signal line of the transmission signal of the output terminal of signal processing circuit 401 be made up of peripheral electrode 2, connecting line 23 shield by copper strips 40, therefore there is the effect that can suppress the interference sent between signal and Received signal strength.

[other embodiment or variation]

In the above-described embodiment, using the receiving electrode of central electrode 5 as the signal from position-detection sensor, using peripheral electrode as the sender electrode sending signal to position-detection sensor, as illustrated in beginning, also can be configured to using central electrode as sender electrode, using peripheral electrode as receiving electrode.

In the above-described embodiment, in shield member 6, the terminal part removing the electrical connection of the cylindrical body 61 be made up of conductive material forms insulation course 62 in the mode covering whole surface, but, as long as can by the insulation between peripheral electrode 2 and central electrode 5, therefore, as long as the insulation course 62 of the cylindrical body 61 of shield member 6 is formed at regional extent corresponding to the region that at least surrounds the surrounding of central electrode 5 with peripheral electrode 2.

The guard block 52 be made up of Ins. ulative material is formed, as long as be equally also formed at regional extent corresponding to the region that at least surrounds the surrounding of central electrode 5 with peripheral electrode 2 to cover the mode of the side, leading section of the core body 51 of central electrode 5.

In addition, in the above-described embodiment, shield member 6 forms cylindrical body 61 by aluminium, processed by alumite, thus form insulation course 62, but being not limited to this structure, also the entirety of the cylindrical body 61 of conductive material removing terminal part 63 can be formed in the mode that insulation course covers.

In addition, in the above-described embodiment, pen pressure detecting unit 10 uses following variable condenser: clamp dielectric with the 1st electrode and the 2nd electrode, enough can be pressed on axis direction according to pen by making in the 1st electrode and the 2nd electrode one and move, thus use electrostatic capacitance variable according to pen pressure.But be not limited to this structure.Such as, also can use if semiconductor element disclosed in JP 2013-161307 publication is to form pen pressure detecting unit 10, wherein, the electrostatic capacitance of this semiconductor element is variable according to pen pressure.In addition, also can not use electrostatic capacitance, and by using inductance value and resistance value to press variable structure and element according to pen, form pen pressure detecting unit.

Label declaration

1 ... framework, 2 ... peripheral electrode, 3 ... insulating sleeve, 5 ... central electrode, 6 ... shield member, 7 ... pressure transfer member, 8 ... looped end sub-pieces, 9 ... terminal plate, 10 ... pen pressure detecting unit, 21 ... printed circuit board (PCB), 21a, 21b ... grounding parts, 30 ... keeper, 51 ... core body, 52 ... insulation course, 61 ... cylindrical body, 62 ... insulation course, 63 ... terminal part.

Claims

1. a position indicator, possesses: the 1st electrode, for receiving the AC signal from position-detection sensor; And the 2nd electrode, for sending AC signal to described position-detection sensor, described position indicator carries out position instruction to described position-detection sensor, and the feature of this position indicator is to possess:

2. position indicator according to claim 1, is characterized in that,

3. position indicator according to claim 1, is characterized in that,

4. position indicator according to claim 3, is characterized in that,

5. position indicator according to claim 4, is characterized in that,

6. position indicator according to claim 4, is characterized in that,

7. position indicator according to claim 6, is characterized in that,

8. position indicator according to claim 6, is characterized in that,

9. position indicator according to claim 8, is characterized in that,

10. position indicator according to claim 8, is characterized in that,

11. position indicators according to claim 8, is characterized in that,

12. position indicators according to claim 11, is characterized in that,

13. position indicators according to claim 4, is characterized in that,